/Engine/Plugins/Runtime/ProceduralMeshComponent/Source/ProceduralMeshComponent/Public/KismetProceduralMeshLibrary.h
Add a quad, specified by four indices, to a triangle index buffer as two triangles.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Components|ProceduralMesh") static void ConvertQuadToTriangles ( [TArray](API\Runtime\Core\Containers\TArray)< int32 > & Triangles, int32 Vert0, int32 Vert1, int32 Vert2, int32 Vert3 )